apt-get spams ignoring *.list.save files unnecessarily

[Stenten]

Binary package hint: apt

When adding a PPA through add-apt-repository, it generates two files in /etc/apt/sources.list.d. One is a .list containing the 'deb http://...' info, and another .list.save, which is a backup of the former.

While reading the package list, apt-get spams the terminal with lines such as:
N: Ignoring file 'google-chrome.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'dockbar-main-ppa-maverick.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'google-chrome.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'dockbar-main-ppa-maverick.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

These messages are completely unnecessary and should be gagged, just like in Lucid.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: apt 0.7.26~exp12ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-14.19-generic 2.6.35
Uname: Linux 2.6.35-14-generic i686
Architecture: i386
Date: Thu Aug 5 22:34:21 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100803.1)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: apt